KosciMiler
Australia's premier 100 Mile Run - the KosciMiler takes you through the heart of the Snowy Mountains for the ultimate runner's high.
Race Category
Running Stones
4
Finals Access
Running 100 Miles is an undertaking like no other, and the KosciMiler provides the ultimate opportunity to test your mind, body and soul. Set amongst Australia’s alpine playground in the Snowy Mountains, the KosciMiler journeys through alpine meadows, snow gum forests and pastural lands, over crystal clear creeks and sparkling lakes, past granite outcrops and ski villages, and to the highest point in Australia – the summit of Mt Kosciuszko. Runnable, scenic and supported – the KosciMiler is the 100 Mile run to do in Australia.
RACE DETAILS
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FRIDAY 28 NOVEMBER 2025 |
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| ELIGIBILITY CRITERIA | Completing a KosciMiler is a physically and mentally challenging event and participation in it requires significant training and preparation. For your health and safety, we require evidence of your ability to take part by meeting the eligibility criteria. |
| ENTRY INCLUSIONS | Race entry, athlete t-shirt, finisher medal, Miler finisher gift, fully stocked checkpoints, drop bag service, on-course medical support and assistance, course photography (able to purchase during rego). |
| TRANSPORT | Shuttle services will be available to the start line. Full details here. |
| MANDATORY GEAR | All runners must carry mandatory gear during the race. Details are on the Mandatory Gear page. |
| MINIMUM AGE | 18 years of age on race day |
| TOTAL ALLOWABLE TIME | 36 hours |
| CUTOFF PACE REQUIRED | 4.47 km/hr |
| FIRST FINISHER | 13hr 15min (4:45pm) |
| FINAL FINISHER | 36 hours (3:30pm, Saturday) |
| TIMING RESULTS | The following age divisions for both male and female will be used for race results (age on 31 December 2025 will be used to determine your age division): 18-19, 20-34, 35-39, 40-44, 45-49, 50-54, 55-59, 60-64, 65-69, 70-74, 75-79, 80-84, 85+ |
| AWARDS & PRIZES | All KosciMiler finishers will receive a finisher medal. Prize money will be awarded to the top 3 overall male and female finishers, and is based on the participant's gun time. 1st place $1,000, 2nd place $750, 3rd place $500. 10 fastest male and females receive a trophy 5 fastest male and females receive free entry to the following year’s event. Trophies will be awarded to 1st in each age division |
| UTMB World Series |  The KosciMiler is a UTMB Worlds Series 100M Event. Finishers of Kosci MILER will receive 4 running stones. |
COURSE DESCRIPTION
From alpine meadows to snow gum forests, golden pastures to lakeside trails, crystal clear creeks and the ultimate mountain summit – the KosciMiler course was designed as the ultimate Ultra-Trail experience.
Starting in the heart of Jindabyne to the roar of the crowds, runners will begin their journey towards the highest peak on Mainland Australia.
Tracing the edge of Lake Jindabyne, runners will then head for the hills and enter the Thredbo Valley Trail, before climbing up to the alpine plateau.
Visiting Perisher, Charlotte Pass, Mt Kosciuszko summit, Guthega and Smiggin Holes, the KosciMiler course takes in plenty of the highlights of Australia's alpine wonderland.
Runners will drop back down into the Thredbo Valley for the final part of their course, culminating with a lap up and over the Thredbo Ski area, to finish 100 miles later at Friday Flat in Thredbo.
It's 100 of the most beautiful, scenic and flowy miles you will ever run - for those looking for the ultimate ultra-trail experience - the KosciMiler is it.
*Maps subject to change, and may change for reasons outside of the Race Organisers control. Select the Time Charts tabs to view the cut-off times for leaving the relevant checkpoint. Time Charts show estimated fastest and slowest times for each race leg and should be used a a guide only. Where the slowest times are greater than the cut-off time, the cut-off time will supersede the slowest expected estimates. If you miss the cut-off then you must follow the directions of officials. Please note that in bad weather conditions, cut-offs may need to be brought forward during the event.
KEY INFO FOR KOSCIMILER RUNNERS
All the information you need to know before starting an extraordinary adventure.
SUPPORT CREW
We love support crews almost as much as our runners at Ultra-Trail Kosciuszko by UTMB – you are always the most colourful (and loudest!) and a huge part of the magical atmosphere of the whole weekend.
You also have the very important job of getting your runners to the finish line.
First job for support crew is to read the support crew section in the Runner Guide, available one month before the event. It contains important information you will need to know for the event.
To keep the event manageable as well as fair and safe for all athletes, and to make sure support crews do not get lost, there is some information that support crews need to know.
- Support crews are allowed to assist runners at certain checkpoints.
- Support crews may only assist their runners within 500m either side of the checkpoints. Support Crews cannot run alongside their runners at any point on the course outside of the aid stations.
For more helpful information please visit the Transport Services page and Spectators page.
PACERS
Pacers are companion runners that can accompany a KosciMiler athlete from various points. You can view pacer pickup locations in the table above. Pacers run for free but must be registered online no later than 27 November 2025. A link to register can be found on the athlete's registration confirmation email. The Pacer's role is to accompany their athlete, to provide moral support, pacing advice and companionship in the latter stages of the event.
There are strict rules regarding pacing:
- Pacers MUST register themselves online as they will be required to sign a waiver.
- All Pacers must wear a compulsory race bib number. Pacer(s) must attend Runner Check-in to collect their bib.
- The minimum age for Pacers is 18 years old.
- Pacer numbers will be light green and match the number of your athlete. This is so we know you are part of the event.
- Pacers must carry their own set of mandatory clothing and equipment items to match that required by the KosciMiler runners.
- Pacers cannot meet their runner before or after the designated start locations or at intermediate points. Doing so results in disqualification.
- Competitors can use three Pacers – but only one at a time (they must change over at a checkpoint).
- If you plan to make an exchange, you must hand over your pacer number to the next pacer.
- Pacers are responsible for their own transport.
- There are no Pacers for Kosci30, Kosci50 or Kosci100 runners.
- Pacers may not carry extra water, food or equipment for runners.
- With the exception of an emergency or medical situation, Pacers cannot provide any material or physical assistance to their athletes.
PACER PICK UP LOCATIONS
You may pick up a pacer from Guthega Power Station 1. The pacer may run with you for as long as they wish until the end of the race.
Pacers cannot join or be switched at Ngarigo Campground.
Pacers can only join or switch over at the designated checkpoints:
| Checkpoint | Location | Distance from start |
|---|---|---|
| CP6 | Guthega Power Station 1 | 97km |
| CP7 | Guthega Power Station 2 | 106.4km |
| CP8 | Perisher Ski Tube | 116.1km |
| CP9 | Bullocks Flat 2 | 128.5km |
| CP11 | Village Green | 147.4km |
